Have the 4 of the UBGholsters called the striker from here: http://www.ubgholsters.com/iwb.htm. Carry my Officer's sized Amigo every day and it disappears. Out of sight, out of mind. Comfortable, and comforting.
When I first started carrying, I packed a full size 1911 in a milt sparks watch six on whatever belt I had at that time. I was a college student so my budget was a little on the lean side after buying some nice leather for the gun. I bought a Rafter S Gunleather belt once I saved up a little more money and had a pretty solid setup. I still carry that combination every so often and I still like it a lot.
I switched to carrying a sig 228 because I wanted to be able to carry more rounds with me. Still using the same belt and I switched to a kydex holster since it gets hot in Texas and I tend to sweat a lot. I now use a Comp-Tac CTAC holster and I really it. It carries very comfortably, conceals well and is fast to draw from. I broke a few belt clips when I first got it, but they have redesigned them and I haven't broken one since. The customer service from Comp Tac is also excellent.
I just ordered a raven concealment holster, but I'll probably set it up for owb carry since I like the IWB setups I have already.
I have an IWB made by SHTF Holsters. I like them a step above Crossbreed for the fact that they come standard combat cut. No additional cost. I carry an XDM and it distributes the weight evenly. Also, my Crossbreed took a long time to get to me, SHTF was only a 1.5 weeks to my door. Great company and the owner is currently serving in the Armed Forces. Support our troops and thier businesses.
Recent Alessi holsters are NOTHING, and I repeat, NOTHING like the holsters that were made under Lou Alessi himself. Unfortunately, from what I've seen of their product I think they're drafting on his reputation, and I'll leave it at that.